弧边负泊松比结构试验与应用研究

Experiment and Application Research of Arc Side Structure with Negative Poisson′s Ratio

以某弧边负泊松比结构为研究对象,进行静态压缩试验,对比分析试验与仿真的变形及载荷数据,试验与仿真承载力峰值误差小,整体变形形式一致,模型可靠。基于该结构建立填充芯,填充于某小型电动汽车前端结构,进行正面碰撞应用研究。通过B柱加速度、吸能量、前端压溃量、驾驶室侵入量等参数对比分析该负泊松比结构在纵梁前端、后端两种填充方式的差异;比较其与传统结构在后填充方式下耐碰撞效果的优劣。结果表明,纵梁后填充方式较前填充方式具有更加优越的耐撞应用效果,弧边负泊松比结构后端填充后,较传统结构可以在得到较低的加速度峰值的同时具有更少的驾驶室侵入量。

Taking an arc-side negative Poisson′s ratio structure as the research object,the static compression was completed,the deformation and load data of the analysis test and simulation were compared.The peak error of the test and simulation bearing capacity was small,the overall deformation form was basically the same,and the model is reliable.Based on this structure,a filling core was established and filled in the front-end structure of a small electric vehicle for frontal collision application research.The difference between the two filling methods of the negative Poisson′s ratio structure at the front end and the rear end of the longitudinal beam was analyzed by comparing the parameters of B-pillar acceleration,energy absorption,front-end collapse,and cab intrusion,and the traditional structure in the post-filling mode,the advantages and disadvantages of the impact resistance effect were compared.The results show that the rear filling method of the longitudinal beams has a superior impact resistance application effect than the front filling method.After the rear end of the arc-edge negative Poisson′s ratio structure is filled,it can obtain lower acceleration peaks and less room invasion volume than the traditional structure.